Add missing override and inheritDoc jsdoc tags

src/ol/style/circle.js

@@ -33,6 +33,7 @@ ol.inherits(ol.style.Circle, ol.style.RegularShape);
 /**
  * Clones the style.  If an atlasmanager was provided to the original style it will be used in the cloned style, too.
  * @return {ol.style.Circle} The cloned style.
+ * @override
  * @api
  */
 ol.style.Circle.prototype.clone = function() {

src/ol/style/icon.js

@@ -275,6 +275,7 @@ ol.style.Icon.prototype.getColor = function() {
  * Get the image icon.
  * @param {number} pixelRatio Pixel ratio.
  * @return {Image|HTMLCanvasElement} Image or Canvas element.
+ * @override
  * @api
  */
 ol.style.Icon.prototype.getImage = function(pixelRatio) {
@@ -283,8 +284,7 @@ ol.style.Icon.prototype.getImage = function(pixelRatio) {
 
 
 /**
- * Real Image size used.
- * @return {ol.Size} Size.
+ * @inheritDoc
  */
 ol.style.Icon.prototype.getImageSize = function() {
   return this.iconImage_.getSize();
@@ -379,6 +379,7 @@ ol.style.Icon.prototype.listenImageChange = function(listener, thisArg) {
  * When rendering a feature with an icon style, the vector renderer will
  * automatically call this method. However, you might want to call this
  * method yourself for preloading or other purposes.
+ * @override
  * @api
  */
 ol.style.Icon.prototype.load = function() {